How much was lost in the Snowflake hack?

The Snowflake hack resulted in $468K in losses on December 30, 2022.

What attack technique was used in the Snowflake exploit?

The Snowflake exploit utilized Rugpull. Understanding this attack vector is critical for smart contract auditors and developers building secure DeFi protocols.

How can developers prevent similar smart contract attacks?

Preventing smart contract hacks requires a combination of secure coding practices, thorough security audits, and understanding common attack vectors like reentrancy, oracle manipulation, and access control flaws. Smart Contract Hacking (SCH) provides hands-on training to help developers and auditors identify and prevent vulnerabilities before deployment.

Snowflake Hack

TOTAL LOST $468K

Low Dec 30, 2022 Rugpull

Affected Chain 2022 Incident surface

Recovered - No recovery reported

All-Time Rank #1026 By amount stolen

Protocol Type Exit Scam/Rugpull Target category

Incident Overview

Quick Summary

Snowflake finance was rug pulled. An EOA address was able to remove liquidity from the Snowflake pools for a total of 468,000 $USD due to the backdoor functionality in the protocol.

Details of the Exploit

The Snowflake Exchange protocol is a single-side AMM (decentralized exchange) designed for

exchanging stable cryptocurrencies (USDT, USDC, DAI).

All protocols contracts are built using a Proxy upgradability pattern. In that case, the project admin has the ability to change implementation anytime. All project liquidity pools have a privileged caller with the role of "pool". Currently, the pool has unverified implementation and exactly this contract was used for the rug pull.

Block Data Reference

Scammer addresess:

https://bscscan.com/address/0x198C258B…481Db6

https://polygonscan.com/address/0x37fb3B6F…781A28

https://bscscan.com/address/0x74016af2…125b18#tokentxns

https://bscscan.com/address/0x37fb3b6f…781a28#tokentxns

Liquidity drain transactions:

https://bscscan.com/tx/0x3f451086…4615a9

https://bscscan.com/tx/0x538498d6…7c0b95

https://bscscan.com/tx/0xd8efdc86…bed511

https://bscscan.com/tx/0xab6bad65…4bb0c8

Incident Report

Protocol / Project Snowflake

Date of Incident December 30, 2022

Attack Technique Rugpull

Classification Exchange (DEX)

Primary Source View Post-Mortem

Protocol Information

Protocol Type Exit Scam/Rugpull

Affected Token SNOW

Official Website www.snowflake.exchange/

Protocol Twitter/X @Snowflake_Defi

Team Anonymous

Source Code Unverified

What the Attacker Needed to Succeed

Understanding the prerequisites for this type of attack helps auditors identify protocols that are most at risk and helps developers build better defenses.

Technical Knowledge Deep understanding of rugpull and Solidity and EVM internals

Capital Required Seed capital to cover gas and initial position setup

On-Chain Access Ability to interact with smart contracts and deploy a custom exploit contract

Protocol Analysis Identification of the exploitable vulnerability in Snowflake's contract logic - root cause: exchange (dex)

Execution Speed Precise transaction ordering and timing to exploit the vulnerability within a single atomic block

Obfuscation Plan A strategy to launder and move stolen funds - typically through mixers, cross-chain bridges, or decentralized DEX swaps to resist tracing

What Auditors Should Check

Could this have been caught in audit? Hard to catch — private key / OpSec failures are outside smart contract audit scope

If you're auditing a protocol with similar architecture to Snowflake, these are the critical security checks that could have prevented this incident (December 2022).

Verify all logic paths related to Rugpull are guarded by proper access controls and input validation
Review privileged functions (owner, admin, governance) for potential abuse vectors - centralization risks should be documented and bounded with timelocks or multi-sigs

Master these auditing techniques with hands-on labs and real exploit scenarios in the Smart Contract Hacking course.

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Sources & References

01
Source 1 https://twitter.com/PeckShieldAlert/status/1608670176022761476?c…

Threat Assessment

Severity Level

LOW

Attack Vector Rugpull
Root Cause Exchange (DEX)
Year 2022

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